Crushing machine for rocks and the like



Aug 17, 1948- E. H. ANDERSON 2,447,303

\ CRUSHING MACHINE FOR ROCKS AND THE `LIKE Filed Jan. 6, 1944 4Sheets-Sheet l cnusHINe MACHINE Foa` nocxs Aun frag LIKE Filed Jam e,1944 l 4 Sheets-sheet 2 @md/MMM arraeys Aug. 17, 194s.`

Filed Jan. 6, 1944 E. H. ANDERSON CRUSHING MACHINE FOR ROCKS AND THELIKE 4 Sheets-Sheet 3 iormeys Aug.' 17, 194s. E, H. ANDERSON 2,447,303

CRUSHING MACHINE FOR RoCKs- AND THE LIKE Filed Jan. e, 41944 vsheets-sheet 4 ing means for protrusively adjusting the pivot seat ofthe toggle plate to vary the clearance or jaw openings between thecooperating jaws;

Figure is an elevation of the receiving end of my crushing machine;

Figures 6 to 8 are diagrammatic side elevational views showing therelationships of the concave surface of the common reciprocating jawmember to the opposed crushing roll in maximum retracted ormaterial-receiving position, completion of crushing stroke and materialdischarging positions respectively;

Figure 9 is a similar diagrammatic View showing the relationship betweenthe concave crushsurface of a reciprocating jaw and the concave surfaceof the crushing roll when adjustment has been made for crushing materialto a finer mesh; and

Figure 10 is a similar diagrammatic vew showing the relative positionsof the concave crushing surface of the reciprocating jaw and its opposedportion of the crushing roll when adjustment has been made for producinga coarser processed maj terial with the machine working at highcapacity; and

Figure 11 is a vertical section illustrating the simplified embodimentof my invention.

In the drawings a Crusher unit forming a part of a complete crushing andscreening plant is illustrated, comprising a main frame H having heavyvertical side plates I0 which are suitably secured together and spacedapart and which have inwardly offset upper wall portions lb deiining thesides of an upper crushing chamber and further acting as a support for aheavy actuating shaft II. A heavy tie I2 connects and reinforces theupper wall portions IIlb at the material receiving end of the machine,having a jaw carrying surface inclined rearwardly slightly from thevertical and to which a stationary jaw plate I3 is detachably secured.The jaw plate I3, as shown, extends the entire distance between the twoside plates Illb of the frame and may be provided with a multiplicity offlutings or ribs extending upwardly and downwardly of the jaw.

A rotary axle I4 is mounted transversely of the frame journaled in heavybearings I5 secured to the outer surface of the lower side plates I0 anddisposed some distance below the stationary jaw plate I3. Axle shaft I4has aixed thereto a relatively large crushing roll I6 constructed ofsuitable hardened material. This crushing roll is disposed below thetiemember I2 and the jaw carried thereby in spaced relation thereto topermit material to be fed to the top of the crushing roll from the rearof the machine in a line of travel substantially tangential to the rollI6. As shown, a declined delivery screen or chute I1 is supported to therear of and above roll I6 with its inner or delivery edge disposedslightly forward of the vertical diameter of the roll I6.

I provide a plurality of reciprocating, jawcarrying pitmans I8cooperating with both the stationary jaw I3 and the crushing roll I6 toproduce two stages or steps of crushing operations. For purposes ofillustration a rock Crusher having only two of said reciprocatingpitmans is illustrated in the drawings, although it will be understoodthat a greater number may be utilized to better balance the crushingoperations and to provide for a more steady stream of crushing impulsesagainst the stationary jaw I3 and crushing roll I6. Each of the jawcarrying pitmans I8 is journaled upon an actuating eccentric I9 fixed toor otherwise provided upon the horizontal tightening plates I0.

4 actuating shaft II, said shaft being journaled in heavy bearingsattached to the upper and forward portions of the upper plates I0b ofthe frame. The two eccentrics I9 have their axes angularly spaced apartrelatively to the axis of shaft II to cause successive crushingoperations on the part of the respective pitmans I8.

The ends of actuating shaft II extend considerably beyond the sideplates IIlb of the frame and have attached thereto large fly wheels 20,one of which may be driven by belt or otherwise from a suitable sourceof power. A horizontal transverse counter-shaft 2| traverses the lowerportion of the frame below the actuating shaft II, extending through thewidely spaced side plates IIl and as shown being journaled in suitablebearings 22 attached to the outer sides of side The bearings 22 areeccentrically mounted in the heavy collars 22a which are adjustablyvaiixed to side plates 29 to provide for `oscillatory adjustment of saidcollars with eccentric effects for positioning bearings 22 for chainpurposes in the driving of the machine. Counter-shaft 2| is suitablydriven from actuating shaft II and as shown a heavy roller chain 23 istrained about a driving sprocket IIa xed to one end of shaft II andabout a relatively large driven sprocket 2Ia fixed to the correspondingend of counter-shaft 2 I.

The opposite end of counter-shaft 2I as shown has afxed thereto adriving sprocket 2lb for driving the crushing roll I6. The shaft I4 ofthe crushing roll is provided with a relatively large sprocket I4a axedto the projecting end thereof on the same side of the frame as drivingsprocket 2 Ib and an endless roller chain 24 is trained about sprockets2lb and |40, for driving the crushing roll at relatively high rate ofspeed.

The heavy pitmans I8 are for the most part of the conventionalconstruction used in rock Crushers and have enlarged horizontal journalsI8a at their upper ends which surround the respective eccentriccylinders I9 of the actuating shaft, suitable roller bearings and racesbeing interposed between said parts for smoothly resisting wear. Thepitmans IB are provided along their rear edges and adjacent their lowerends as shown with adjustable, double fulcrum seats 25, each of saidseats having two spaced seating channels 25a adapted for reception ofthe forward edge of a toggle plate 2'I and each being interposed forlimited vertical adjustment through the medium of one or more spacers orshims 26 between heavy seat attachment lugs 28, rigidly' secured to thepitmans. Each of the toggle plates 21 is of conventional structure,having a weakened central portion 21a extending throughout the lengththereof and having its rear edge seated in an elongated pivot seat orgroove 29 which is adjustably mounted in a tie frame 30 connected acrossthe side plates I0 of the frame at the lower forward corner thereof. Theconstruction of this seat and its adjustment mechanism is of special andimproved construction and will be described later in detail. The lowerend of each of the pitmans I8 is connected by a, spring tensioning linkdesignated in its entirety by the numeral 3I with the transverse tieplate or frame 30, said spring link holding the fulcrum seats of thepitmans at all times against the forward edge of the toggle plate.

Each of the pitmans I8 has detachably secured to its inner longitudinalface a pair of jaw members 33 and 34 opposed respectively to the upperstationary jaw I3, and to one side of the crush-l incirca Iii. Theupperjaws-aaf of thetwo:piti'nans-` are-of" approximately ono-half thelwidth ofi stationaryjaw IS-'a-'ndare opposed thereto inside by siderelati'on'shipas clearly show-nin Figure 2 and maybe-providedwithlongitudinal iiutings or ribs-to match' thetlutings ofthe-stationary jaw I3.- By reference to Figures 2 and 5 it will be notedthat the upper: crushingchamber defined between-.the upper plates- Ililbofthe trameis-substanti'ally'A oil less width than the lower crushingchamber extending between. the lowermain plates [2U-of the' frameandthat-the -end's of crushing rol-i- 6A project outwardly for.considerable distances beyf'oildtheY outer longitudinali edges: oitheupper reciprocating j'aws- 33; The lower reciprocatingjaws-345-aiie--thus--forrned to eachoppose approxi-- mately'ot'thelength--of'crushing rolliii-and ably secured to the lower portionoi e' 'p'itmansfacesand as shown have -shi'nig surfaces- 3la arcuatelycurved oni-'substantially the radi-usefcrushihgroll It, andi are'positioned and related to the opposed peripheral surface oi' thecrushing roll, at the maximum crushing positions of pitmans I8,- insubstantially concentric rel-'ation therewith for customary operation ofthe machine. The upper or hing area 'of the lower jaws @il may be moreor'less planul-ar as shown-5 or may be concave as illustrated inhereinidentified (so-pending application, but -an-yeven-t divergesangularl-yfrom the lower con-cave crushing surface 3io-andailso iron-rthe-opposing portionof the crushing rolli delriin-g'wi-th. the lowerconcave surface Mc a ridge Mb'- Wh-ich has an important classifyingfunction the operation oi the machine and particularly controlling anddirecting the materiali-received for crus-hing between the vlowerconcave portion of the jaw 34 and the crushing rol-1i as will herein bemore full-y explained.

It desire-leleI for certain purposes of adj-ustvin varying the speed andcapacity of thev machin-efor production of particles of varying size-ythfatth-'e relationship of the' concave crushing surface 36a and theopposed portion oi the crushing rol-1 be vertical-ly varied Within aslight range.- mile-this varian-ce in the said relationshipmay `beaccomplishedin several ways, as shown in the-drawings, I provide aboveand below the-'respective horizontal jaw edges of member 3%, a sriesof?spacing elements or shiins -3'5 which may vbe removed or 're-arranged toposition jaw member 34 somewhat higher or somewhat lower, as desired toits position shown in the drawing. The jaws 3-3 and 3d may be removablysecured to the respective pitmans I8v in any suitable manner andas'shown, rectangular retaining clips 3S are employed for engagingA certainof the transverse edges ofthe jaws, clamped to the pitmans by suitableclamp-ing b-olts 36a.

The upper longitudinal edges of the upper jaws 33 are-secured' Abyundercut longitudinal receiving edges `I8b formed just below thejournals Ida at the upper portions of the pitmans. The lower edges ofthe lower jaws 34 as shown, are clamped by upwardly extending clampingbolts 3'! threadedi-y engaging the flanged jaw-holding edges I8c attirelower edge of pitrnans I8.

.In Figures 2 and 3.1 illustrate suitable mechari-ism for controllingdistribution oi less coarse material tothe top of rcrushing roll It,said mechanism as shown comprising a pair of ldiverging adjustabledeflector plates 39 pivoted at their outer ends to a common hinge axis4S which extends" normal to the screen chute I1 and having theirloweredgs disposed vflush against the top or said screen. The-hinge-fordeectingrpiatesia issecured* to landlsupported from. arearwardly:extending post'. Ill: which as. shown. is rig-idlyv at'- tached to; amounting -plat'eor' bracket 42' secured as by bolts 4'3-'to1the'rearedges off the longitudinal 'ribs IJZa, provided by the heavy tie memberi12 which. carries stationary j awf-If3; The d'eector plates 39" are1.angularl-y adjustable tl'irough: wide limits bymeansof. pivoted links(19a pivoted. to the' ir-mer sides `thereof` and each` hav:- i-n'g-at"the .outer end. thereof; aJ ser-ies of attach.-

ent: apertures. adapted tofreceifvean upstanding pin da provided: by thesupporting post 4I. It will beseen thatLthe.-less coarse material.delivered to. the-machine bythe screen-chute. I1 which ispromoted*with.E guiding sides I 15a, may be. deflected as: desired.tobe. distributed through. substantially the entire. top: of crushingroll. I6-.or may. be deflected for distribution throughout various areasadjacentithe endsoif; roll L6.I

I providefscraper'.means 'associated with the revolving Crusherrolltoprevent accumulation of gummy material uponthev concave crushingsurfacef'd of the-lower. jaw. As show-n, this mecha.- nism comprisesascraper blade -44'of channel construction mo-.unt'ed longitudinallyupon the periphery of roll Iwith its. channel. disposed outwardly andasshown'removabl'y secured to 'theouter roll by a plurality ciclarin-.ping bolts 44a. LT-heedges of. the channel bar are adaptedit'oscrape against theconcave surfaces-Mani the lower jaw duri-'ng theoperation of lthe machine, .removing any gummy or stickymateriallthereirom in the innermost position-s of the reciprocatingjaws.

To protrusively adjust the toggle pivot-seat 29, and-consequently theclearance of thezreciprocating. jaw, efflcient'- mechanism is-.providedas. in Figures Lian-d. 1,.

The, heavy tie bar or frame memberlllwhich connect-s' the lower portionsof the; side Walls in, rigidly carries a. pair of spaced perpendicularinwardly extending .webs 39a between which the adjust-ment elements-:torthe pivot' seat are .slidab-ly mounted. 'The back. web or ups-tandingbody portion. 3d of .the tiemember constitutes, a seat or vbedxfo-r .theadjustment mechanism and inwardly otsaifdi bed a plurality ofremovablespacer bars. d5 .are disposed. Opposed. rectangular 4apertures VIic` areformed: in the vertical frame. walls it aligned -wifth the; Aspacebetween the-housing webs that to facilitate removal of one. or. more ofthe spacing bars `lli from one or bothzsidesrof thev machine. 'The pivotseat member or block .29. has opposi-tely inclined 'or beveled surfacesMaat its rearside extend-ing longitudinally .of the block from thecenter thereof to the end,`lthe inclination of said -bevel'ed surfacesbeing o-frelatively small angularity,preferablyless than 30.". I providea--double wedge. lmechanism inter-posed be-- tween said Abeve-ledsurfaces 29a and the base -of resistance of the adjustment mechanism,which asf-shown comprises a pair oi" aligned Wedge blocks' E6 i/iavin'gplane surfaces extend-ing #perpendicula-'rly to the ends thereof forengagement with the iin-ner surfaces of the innermost spacer-bar 45 orthe tie bar-30 as the case may be :and having inclined or beveledsurfaces 46a complementarily for-med and angled for 'engagement with theoppcsitely beveled thrust surfaces 29a offt'h'e pivot seat block 123.vEach 'of-the wedge blocks d6, `as shown, is provided Witha tapped Core#Gb constructed of suitable hard metal, `the coresb of the two Wedgeblocks bein-'g oppositely threaded to engage the opposite threads ",ofga4double screw-operating `member `47 which lis 'dis-f 7 posedtransversely of the machine and has, as shown, squared manipulating ends41a extending beyond the walls of the machine frame for connection withan adjustment crank or other device for turning the double screw.

With my said toggle pivot-seat adjustment mechanism, because of thecombination of the removable spacer bars 45 with the wedge mechanismhaving wedge surfaces angled quite gradually, power application ismultiplied when the double screw 41 is turned and wide adjustability ofthe pivot seat and consequently the spaced relationship of the Crusherjaws is efciently obtained. Thus when it is desired to space the crusherjaws widely apart, one or more of the spacer bars 45 may be removedthrough one of the lateral apertures IUc in the frame wall and the wedgemechanism adjusted properly thereafter,

To close the apertures Ilib in the frame walls I0, to prevent leakage ofoil or lubricant and access of foreign material to the adjustmentmechanism, I provide at each side of the machine frame a closure plate48 which overlaps the associated aperture II'Ib. Each of the closureplates 48 is provided for bolt and slot connection with the edges deningthe aperture and secured adjustably over the aperture by bolts 48a. Theplate is sufficiently long in each instance to cover the aperture andprovide a bearing 48D for the double screw member in the variouspositions of the wedge block-s 46 when one or more of the spacer bars 45are removed.

Operation The crushing unit illustrated in Figures 1 to 10 inclusive andherein previously described, is associated with a crushing and screeningplant having a feed conveyor (not shown) and having a classifyingtwo-deck screen of which fragments of the upper coarser screen Ell andthe lower finer screen I1 are shown in Figure 1. In such a plant thecoarse material to be ground is conveyed by the screen chute 50 to thetop crushing jaws and the material crushed is received below the machineby return conveyor not shown and conveyed to the finer screen I1 forsecondary grading, the finely ground material dropping through screen I1into a collection bin shown in Figure 1.

It will, of course, be understood that my crushing machine, or unit,including the ecient crushing cooperation between revolving roll I6 andthe reciprocating jaws 33 and 34 per se, may be utilized in manyinstallations and for many purposes all within the scope of myinvention.

In operation rocks or other hard material of 12-inch ring size orsmaller are delivered to the top screen chute 50 which separates off thelarger material to be crushed above a predetermined size-say forexample, a size in excess of 2 inch ring. The small rocks and materialdrop upon screen chute I1 and are fed thereby between the heavy tie barI2 carrying the Xed jaw I3 and the roll I6 being delivered to the top ofthe roll which guides the smaller material between the crushing portionof the roll and the reciprocating jaw 34. The fines, of course, dropthrough screen I1 and are collected in the bin or hopper B. The largerrocks and material are fed by the coarse screen chute 50 and the top ofjaw I3 to the entrance of the machine between stationary jaw I3 and theupper reciprocating jaws 33 where they are crushed and reduced tosmaller size. In the successive reciprocation of the two or more pitmansI8 the jaws 33 and 34 are moved successively toward the stationary jawI3 with a coni-I pound downward movement as they approach maximumcrushing position, this downward movement tending to draw the materialdownwardly between the jaws. The distribution of applied power with myimproved device is greatly improved over machines of the prior art sincea plurality of pitmans are used having eccentric connections with themain shaft I I at varying angles to successively move the several jawsagainst the associated crushing elements, thereby improving the crushingefiiciency of the machine and more uniformly applying crushing poweragainst the upper stationary jaw and the crushing roll.

The material crushed between stationary jaw I3 and the upper jaws 33 ofthe pitmans drops by gravity to the secondary crushing mechanism belowand is fed between the roll I6 and the lower jaws 34 of the pitmans. Tothis material is added material which is being fed to the machine by thedeclined classification screen I1 entering the machine laterally betweenthe stationary jaw I3 and the top of crushing roll I6. By reference toFigures 6 to 8 it will be seen that in view of the compound movement ofthe pitmans and the cooperation between the roll I6 and my lower jaws 34particularly the concave portion 34a, the receiving position between thelower jaws of the crushing roll as shown in Figure 6 presents aconverging space for the material dropping by gravity from the firstcrushing operation or fed into the machine by screen I1 and thereafterin the maximum crushing stroke or position shown in Figure 7 causesdisposition of the concave surfaces 34a of the lower jaws insubstantially concentric relation with the crushing roll and thereafteras pitmans I8 are retracted from the crushing roll, presents a divergingspace between the cooperating portion of the roll and the concaveportions 34a of the jaw for discharge of crushed material by gravity andwith the assistance of the revolving roll. At the times of discharge andof maximum crushing (Figures 8 and 1 respectively) it will be noted thatthe transverse rib 34h defined by the intersection of the concave jawportion 34a, with the upper substantially flat contiguous jaw portion,is maintained at more or less a predetermined spaced relation to thecontiguous surface of the crushing roll acting as a classifyingmechanism to prevent reception and discharge of material below apredetermined size as the jaw is retracted from the crushing roll. Thesurface above the concave surface 34a of the lower jaws is angled withrespect to the concave surfaces and with respect to the crushing rolland diverges sharply from the Crusher roll to properly guide thematerial for the secondary crushing.

Thus an eflicient control of the feeding of all material between thecrushing and cooperating lower jaws 34 is provided with the vwithholdingof this first crushed material between the crushing roll I6 and concaveportion of the lower reciprocating jaw 34 until one or more full strokesof the reciprocating crushing jaws have acted upon the material. Thematerial crushed between the roll and lower jaws drops in the dischargestrokes of the respective lower jaws upon a return conveyor (not shown),if desired, which delivers to an elevator (not shown) which delivers toa feeding conveyor (not shown) carrying this material to the classifyingscreens or at least to classifying screens I1, the fines then passingthrough screens I1 into the collection bin B. In the crushing of thematerial between the roll I6 and reciprocating jaws 34a the jaws move,

9i at relatively .high ,speed to fthe travel oftheI roll. The speedratio, timingand relationship .of `the concave areas with the resultantslight tilting of the -pitmans in their reciprocation with the smalldownward and upward component movements are such that preferablymaterial will not be released at the bottom of the machine until .it hasbeen subjected tol `at least. two .crushing strokes of the reciprocatingjaw. The controlV effected by the relationship of the ribs V3111)at'they upper edge of the yconcavecrushingsurfaces is important incooperating to'A this unitary result and consequentlythe crushedmaterial dropping from the bottom of the machine is of Aquite uniformsize. This means that a much smaller percentage'of material mustbereturned to the'machine for axsecond .crushing than in Crushers nowextensively utilized.

Great latitude for adjustment inthe spaced relation and positioning ofthe lower jaws 34 and particularly the Aconcaved portions 34a to theassociated side of the crushing roll is made possible with my improvedconstruction. The spaced relationmayibe readily adjusted bythe doublescrew actuated mechanism for adjusting the -pivot seat 29-of1the toggle.Adjustment of therfulcruming of the pitmans `I8 within 1limits is madevpossible with my .improv-'ed structure, first by selectively engagingthe inner or upper edge of the -toggle plates 21 withone `of the otherof the `rrecessesy 25a ofthe fulcrum seats 25 secured to'the'respectivepitmans and secondarilyby re-arranging the shim, or shims, or otherspacing means 26 interposed between'theseat block 25 and its attachment'lug'sr28.

'Another ver-y important relational adjustment whichis obtained with myimproved apparatus is effected through the provision of means -zfor`ver,- tica-lly adjusting the 'concave' surfaces 3`4a of the lower jawsrelative to the cooperating side por-y tions of roll I6. The provisionfor such adjustment in -th'eembodiment shown comprises la lplu-V ralityof spacerv strips or shims 35 interposed between the upper and loweredges of jaWfSI-and-its seat and securing members, whereby therearrangement of thev shims, as illustrated-in Figures. 9-and 1,0.=andthe relation of the concave surfaces 34a of the jaws to the crushingIroll can be changed Withinilimits.

In Figures ,9 and the lower jaws and rolls are illustrated inl extremecrushing position. vIn Fig*- ureg, Vthe lower jaw has been raised abovethe position shovfninligu-res'land 6 to 8 of the drawings. This isdesrablewhere a very fine grade of Y,the output of material is desiredand-where the 4material `fed into the machine''is not '-too coarse. 'inthe-adjustedposition shown in Figure 9,-whi=ch it is lto be rememberedis the maximum' crushing'position, the concave surface ySila isnotdisposed quit-e concentrically of roll' t6 but diverges'from'fitsupper-to its lowerportiontherb Mb stillacting as a classifying mediumbut `the lower ribs -'flcdened by the intersection of the concavesurface with the lowermost surface of the jaw'also beinga classifyingmedium and -servingto retain material forone orlmore additional crushinglstrokesbefore it is discharged from' the machine.

-InFigure 10 the positional relationship of the lowercrusl'iingrjaw--3ltA has been lreversedfrom that shown. in 'Figure 9,Figure l0 being in lowered position'` obtained by-shifting of `spacingshims 35, than theusual operatingposition-showniinfFigure'l-.andzl'igures 6 to 8. Againit istube-remembered that in-li'lligu-re 10 jawA34 .s-ishown'fin 10 itsvmantimum crushing position 4relative tothe roll IS.. Here it will beseen that the space between the jaw and roll diverges from top to bottomof the crushing area, thereby tending to speedup ldischaI-geof `materialand the rib 34h of thefupper edge ofthe concave surface chiefly acts asthe classifying medium. 'Iihis positional relationship shown in Figure-10 is preferred for the crushing of coarser products and forspeeding'uptheicapacity yof the machine, andthe material crushed betweenroll |56 and jaws .34 may be 'subjected Ito only one complete crushingaction before discharge.

The area .relationship between the upper reciproeatingv jaws 33 and thelower -jaw '34 which crush aga-inst vthe .roll as well vas thedistribution of .the crushing load is very important. `With mylconstruction the feed gates or deector plates- 35 mounted edgewise uponthe screen chute-fl :1 may b e adjusted depending upon the amount lofmaterial at any predetermined' time which is fed tog-thesecondaryxcrushing mechanism by screen i l to obtain a substantialuniform crushing load over the entire 'length' of crushing roll l5. Thusif the raw material to be crushed containsaconsiderable percentage ofsmall material which passesthrough .the upper classifying screen :50,the gates 'are adjusted to Vdistribute pretty' yuniformly to thegreeter-.portion of the crushingroll. Winilei'f only a relativelyzsmallamount of smaller sized material is .being fed into the machine'over thescreen. chutev Il, the gates are adjusted to direct most of thismaterialto the outer o1-end portions of the crushing roll since 'the lload uponthe ,central vportion ofv the crushing( roll will y'be relatively-hea-vy `duetto a greater percentage of raw material being crushed byjaws .33 and" the stationary-jaw. f f

.:Erom vthe foregoing description it' will beseen Jchat fI have provideda. comparatively light, highpowered vcrushing unit having a .very higheiliciency and capacity for its weight `and furthe power applied andparticularly' adapted for' a .number of different .adjustments Vto suit-`particu lar requirementsv as to size of the crushed material desired.Y I

'In :Figure 1d. .asimplied crushing Amachine-#is illustrated employingmany of .the features of the o rm` of my,inyentionxiirst described. Inlthis machineno .stationary crushing law is utilized but all crushingoperations Vare effected between a reciprocating jaw .5l and a revolvingcrusher` roll 52. Ilhe mounting, toggle mechanism 4and adjustmentmechanism -for the 'pitmans and ire-- ciprocating jaw :55| are vsimilarto the ymachine first described and, therefore, need not be .heredescribed-inldetail. :The-,jaw 5.| has an upper concave .crushingportionffila which diverges considerablyrfrom'fthe .:lower .portionthereof to its upperifportion with reference tothe cooperating sidefof,crushingarollrZ .and `is preferably provided with aseries of transverseyteethor ribs 51h-to cause-,the larger material lintroduced to'begripped andifprevented'from upward slipping.

uppenconcaye crushing surface .5 I amerges at lrits lowerfedge, .with alower concave crushing surface' ..5105 defining in :its intersection*`with said lower concavensurface'a classifying rib 51d, the

said upper Ysurfacediverging materially from thel curve `or segmentofthe lower concave surface 51e.A 'Ehe-lowerconicave surface 51o ispreferably unribbed and uncorrugated. K

While thejaw 51- may be integrally formed throughout to .denethe -twoconcave crushingy portionsfor surfaces 5ta Land y."I c, I'prefer--tcform f a concave crushing jaw portion 51o through theprovision of a replaceable jaw section. Thus this jaw section Ic whichreceives more wear than the upper concave section 5Ia vmay be readilyreplaced and, as shown, is attached to the pitmans by means of aplurality of clamping bolts 54, which extend through truncated conicalapertures disposed in transversely spaced relation across the pitmans.

In this form of my invention the crushing roll is revolved in clockwisedirection to assist in feeding material between the cooperating crushingmembers and to move such material downwardly for crushing and discharge,and the fast reciprocating jaw will first crush the coarser materialbetween the upper concave area and the crushing roll, such materialafter original crushing, working down and being classified by therelation of the lower concave crushing surface 5 I c and classifying rib5Id into position between the lower concave crushing surface 5lc and thelower side of the crushing roll 52 opposed thereto. Secondary crushing.then takes place and the material in sub-divided state and in fairlyuniform size is delivered at the bottom of the machine.

Here again `as illustrated in Figures 9 and 10 the positionalrelationship of the lower* concave crushing surface 5 Ic may be variedwithin limits through the arrangement of two sets of spacing strips orshims 35 between the edges of the jaw member 5|' proper and its seatededges. In this formof the invention two or more reciprocating jaws maybe employed in opposition to the revolving roll,l if desired, to moreuniformly and efficiently distribute the power from its source and theapplication of that power against the crushing roll.

It will, |of course, be understood that various changes may be made inthe form, details, a1'- rangement and proportions of the parts withoutdeparting from the scope of my invention.

Y What I claim is:

1. In a crushing machine, a rotary crushing roll, a reciprocatingcrushing jaw opposed to one side of said roll, means for revolving saidroll in a direction to cooperate with said reciprocating jaw formaterial feeding and crushing purposes, means'for reciprocating said jawtoward and away from said crushing roll with a compound, limiteddownward movement as said jaw approaches said roll, said jaw having alower concave crushing surface opposed to a side of said roll andextending substantially concentric thereof and said roll carrying aVlongitudinally extending blade protruding from the periphery thereoffor engaging said jaw to scrape sticky material therefrom.

2,. In a crushing machine, a stationary crushing jaw inclined somewhatfrom the vertical position, a horizontal 'crushing roll mounted belowsaid' stationary jaw and spaced therefrom, said roll being substantiallylonger than the width of said stationary jaw with its ends projectedbeyond the sides of said jaw and mounted with one side of its peripherydisposed at least close to vertical alignment with the lower edge ofsaid stationary jaw,'a Aplurality of common reciprocating jawcarryingmembers opposed to both said stationary jaw and said crushing roll, aplurality of upper crushingk jaws attached to said reciprocating membersand disposed in side by side relationship and having an aggregate widthsubstantially equal to the width of said stationary jaw, a plurality oflower crushing jaws also securedl to said respective reciprocatingmember and disposed in side by side relationship in opposition to oneside of said crushing roll, the aggregate width of said lower jaws beingsubstantially greater than the' aggregate width ofsaid upper jaws andbeing substantially equalto the lengthof said crushing roll, means forfeeding coarse material between the upper portions 'of said stationaryjaw and said upper reciprocating jaws, means for feeding less coarsematerial from outside of said machine over the projecting ends of saidroll, means forrevolving said roll to convey said last mentionedmaterial downwardly toward said lower reciprocating jaws, means forreciprocating said plurality of reciprocating members in4 staggeredrelation to produce successive crushing operations of said severalreciprocating jaws against said stationary jaw and said crushingrol1,`and means for varying the area of distribution of said less coarsematerial upon the top of said crushing roll.

3. In a crushing machine, a horizontal crushing roll, a reciprocatingjaw-carrying member opposed to one side of said roll, means forrevolving said roll in a direction to cooperate with said reciprocatingmember for feeding and crushing of material, means for reciprocatingsaid member toward and away from said crushing roll with a compoundlimitedl downward movement as said member approaches said roll, a jawattached to said reciprocable member and having a concave crushingsurface opposed to one side of said roll and curvedin general along asegmental path substantially concentric with said roll and means forsupporting said jaw from and attaching said jaw to said reciprocablemember in a plurality of different vertical positions relative to thelower end of said reciprocable member to thereby vertically vary thepositional relationship of said concave crushing surface relative to theopposed cylindrical surface of said roll whereby the discharge ofvcrushed material from the machine may be selectively retarded orexpedited within limits;

4. Ina crushing machine, a stationary crushing jaw inclinedsomewhatfromthe vertical position, a horizontal crushing roll mounted below saidstationary jaw and spaced therefrom, said roll being substantiallylonger than the width of said stationary jaw with its ends projectedbeyond the sides of said jaw and mountedwith one side of its peripherydisposed at least close to vertical alignment with the lower edge ofsaid stationary jaw, a plurality of common reciprocating jaw-carryingmembers opposed to both said stationary jaw and said crushing roll, aplurality of upper crushing jaws attached to said reciprocating membersand disposed in side by side relationship and having an aggregate widthsubstantially equal to the width of saidstationary jaw, a plurality oflower crushing jaws also secured to said respective reciproeating memberand disposed in side by side relationship in opposition to one side ofsaid crushing roll, the aggregate width of said lower jaws beingsubstantially greater than the aggregate width of said upper jaws andbeing substantially equal to the length of said crushing roll, means forfeeding coarse material between the upper portions of said stationaryjaw and said upper reciprocating jaws, `means for feeding less coarsematerial from outside of said machine over the projecting ends of saidroll, means for revolving said roll to convey said last mentionedmaterial downwardly toward said lower reciprocating jaws, means'forreciprocating said plurality of reciprocating members in staggeredrelation to produce successive crushing operations of saidseveral'reciprocating jaws against said stationary 13 jaw and saidcrushing roll and means for controlling the feed of less coarse materialfrom outside of said machine over said roll.

EINAR H. ANDERSON.

REFERENCES CITED The following references are of record in the file ofthis patent:

UNITED STATES PATENTS Number Name Date 49,032 Ingersoll July 25, 186555,181 Wagner May 29, 1865 197,643 Lanyon Nov. 27, 1877 697,802 CalkinsApr. 15, 1902 Number 1o Number France Nov. 22,1906

